Open plugins are meaningless when the platform itslelf isn't open.
There are also lots of markdown centric note software so its not too much of a draw for obsidian.
Personally I'd never use a proprietary note app, having to switch if the company shutters is too much, at least FOSS apps can be forked. Though, I've not heard anything bad about the obsidian team, maybe they open source it if they shut down. They also don't seem like the type to rugpull their customers. But you know how many companies people have said that about.
Open plugins do have a meaning for many developers even if the platform itself isn't open. The meaning is: developers can easily find reference code to develop their own plugins and can easily patch open plugins when they break.
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Open plugins are meaningless when the platform itslelf isn't open. There are also lots of markdown centric note software so its not too much of a draw for obsidian. Personally I'd never use a proprietary note app, having to switch if the company shutters is too much, at least FOSS apps can be forked. Though, I've not heard anything bad about the obsidian team, maybe they open source it if they shut down. They also don't seem like the type to rugpull their customers. But you know how many companies people have said that about.
Open plugins do have a meaning for many developers even if the platform itself isn't open. The meaning is: developers can easily find reference code to develop their own plugins and can easily patch open plugins when they break.